I have Native Access 3.12.1. The great majority of my libraries are fine, but there are a few which I can't install although they appear on the Available tab. They include Polyplex, TRK-01 and the Battery 4 Factory Library. When I try to install them they briefly appear in my Download Location folder but then disappear without going into my Content Location folder. In Native Access they still appear on the Available tab (not the Installed tab), and their Install buttons are still lit. I have tried reinstalling NA, without success. Any suggestions please?